dystrophic calcification the deposition of calcium in abnormal tissue, such as scar tissue or atherosclerotic plaques, without abnormalities of blood calcium.
eggshell calcification deposition of a thin layer of calcium around a thoracic lymph node, often seen in silicosis.
Mönckeberg's calcification see under arteriosclerosis.
[Dorland's Medical Dictionary for Health Consumers. © 2007 by Saunders, an imprint of Elsevier, Inc. All rights reserved.]
[Dorland's Medical Dictionary for Health Consumers. © 2007 by Saunders, an imprint of Elsevier, Inc. All rights reserved.]
cal·ci·fi·ca·tion n.
1. Impregnation with calcium or calcium salts. Also called calcareous infiltration.
2. Hardening, as of tissue, by such impregnation.
3. A calcified substance or part.
[The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.]
calcification Etymology: L, calx + facere, to make
[The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.]
calcification Etymology: L, calx + facere, to make
the accumulation of calcium salts in tissues. Normally, about 99% of all the calcium entering the human body is deposited in the bones and teeth; the remaining 1% is dissolved in body fluids such as blood. Disorders affecting the delicate balance between calcium and other minerals, parathyroid hormone, and vitamin D can result in calcium deposits in arteries, kidneys, lung alveoli, and other tissues, interfering with normal organ function. See also calcitonin, calcium, calculus. calcific, adj.
[Mosby's Medical Dictionary, 8th edition. © 2009, Elsevier.]
[Mosby's Medical Dictionary, 8th edition. © 2009, Elsevier.]
calcification
the deposit of calcium salts in a tissue. The normal absorption of calcium is facilitated by parathyroid hormone and by vitamin D. In poisoning with calcinogenic glycosides and when there are increased amounts of parathyroid hormone in the blood (as in hyperparathyroidism), there is deposition of calcium in the soft tissue. (In hyperparathyroidism secondary to renal disease there is deposition in the alveoli of the lungs, the renal tubules, beneath the parietal pleura, the gastric mucosa, and the arterial walls.) Normally calcium is deposited in the bone matrix to insure stability and strength of the bone. In osteomalacia osteomalacia there is an excess of unmineralized osteoid because the aged well-mineralized bone is replaced by a matrix that is inadequately mineralized.
dystrophic calcification the deposition of calcium in abnormal tissue without abnormalities of blood calcium.
metastatic calcification deposition of calcium in tissues as a result of abnormalities of calcium and phosphorus levels in the blood and tissue fluids.
nutritional calcification calcification in soft tissues as a result of an increased intake of calcium.
soft tissue calcification see metastatic calcification (above), dystrophic calcification (above).
[Saunders Comprehensive Veterinary Dictionary, 3 ed. © 2007 Elsevier, Inc. All rights reserved.]
No comments:
Post a Comment